"Fixed" issue where build would always build.

The problem seems to be with the images.h file.
It is always created, which touches the images.h
file, which causes "Build" to rebuild anything
that depends upon images.h.

It seems like you'd figure you could do something
in CMake that would only create it, if the
dependencies changed.

What I have done is made it so that the script
checks to see if there are any changes, and if
there are none, it doesn't touch the images.h
file!  This allows for the build/rebuild to be
stable.  (It only builds when something has
actually changed!)

CMakeLists.txt

@@ -1,6 +1,8 @@
 cmake_minimum_required(VERSION 3.5)
 
-project(horrible-harry)
+project(horrible-harry
+  VERSION 0.1
+  LANGUAGES CXX C)
 
 
 ###########
@@ -138,6 +140,11 @@ add_subdirectory(zf_log)
 # )
 # add_executable(yourProj ${SOURCES})
 
+add_executable(ansi-to-src ansi-to-src.cpp utils.cpp)
+if(DISABLE_BUFFER_DEBUG)
+target_compile_definitions(ansi-to-src PUBLIC NO_BUFFER_DEBUG=1)
+endif()
+
 add_custom_command(
     OUTPUT images.h
     COMMAND ./build_images.sh
@@ -155,13 +162,10 @@ if(DISABLE_BUFFER_DEBUG)
 target_compile_definitions(hharry PUBLIC NO_BUFFER_DEBUG=1)
 endif()
 
-add_executable(try-re try-re.c)
+# If you want this: ninja try-re or make try-re
+add_executable(try-re EXCLUDE_FROM_ALL try-re.c)
 
-add_executable(ansi-color ansi-color.c)
-add_executable(ansi-to-src ansi-to-src.cpp utils.cpp)
-if(DISABLE_BUFFER_DEBUG)
-target_compile_definitions(ansi-to-src PUBLIC NO_BUFFER_DEBUG=1)
-endif()
+add_executable(ansi-color EXCLUDE_FROM_ALL ansi-color.c)
 
 add_executable(images images.cpp utils.cpp images.h)
 target_link_libraries(images zf_log)

build_images.sh

@@ -16,5 +16,18 @@ ansi-to-src panther.ans >> $BASE
 ansi-to-src bat.ans >> $BASE
 ansi-to-src icu.ans >> $BASE
 
-mv -f $BASE $FINAL
+# workaround
+if [ -f "$FINAL" ]; then
+  # file exists
+  diff -q $BASE $FINAL
+  status=$?
+  if [ $status -eq 0 ]; then
+    echo "no change..."
+  else
+    mv -f $BASE $FINAL
+  fi	  
+else  
+  # file doesn't exist, so no choice by to copy it over.	
+  mv -f $BASE $FINAL
+fi